[nos-bbs] JNOS rig control of frequency

[Andrew Pepper]

You'd be better off using one port on vhf and the other port on uhf. All
you'll need is a dual band antenna and a diplexer... Or just use two
antennas. Then you'll avoid the need for expensive VHF duplex filters and
worrying about both transmitters TXing at the same time.
Andrew

On Sat, Jun 4, 2022, 15:19 <maiko at pcsinternet.ca> wrote:

>
> > Please confirm the following:
> >
> > •     The second interface would allow JNOS to simultaneously listen to
> > both frequencies, logging all traffic and serving its BBS on both
> > frequencies. (This one I am sure of.)
>
> Of course.
>
> >
> > •     JNOS will not trigger a second radio to transmit at the same time
> as
> > the first. (This was one of my earlier questions, and I honestly do
> > not know the answer.)
>
> There is no way for JNOS to know, especially in KISS mode, it sends the
> data when it wants to send the data, so it has no idea when PTT is going
> to be active or not. Unless it controls PTT direct for some of the more
> recent code I wrote, but even then there is no 'check if another radio
> is active' type of code. I could put in code, but that could possibly
> introduce longer delays, since you still don't really know when the TNC
> is going to PTT the radio ? I have no experience with this, but this is
> what my sense would be.
>
> But it gets worse, even if one radio is not transmitting, suppose you
> are receiving a packet on the one, and you key up the other ? Signal
> will most likely get WASHED out anyways by your own TX on the other
> frequency ? Hopefully I am not making a fool of myself, it's been
> years since we played with stuff like DIODE MATRIX interconnected
> systems and the sort, that was a LONG time ago, oh my gosh ....
>
> Either huge duplexor cans or TNCs that can be GPS sync'd (never heard
> of that, but it would be cool, similar to motorola canopy systems).
>
> Yeah, if anyone wants to better educate us, please do :)
>
> > This would allow continued use of JNOS without additional work from
> > anybody.
>
> There would need to be some type of additional work in my opinion,
> unless
> you could somehow manage to separate the antennas really really good ...
>
> Maiko / VE4KLM
>
> _______________________________________________
> nos-bbs mailing list
> nos-bbs at lists.tapr.org
> http://lists.tapr.org/mailman/listinfo/nos-bbs_lists.tapr.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.tapr.org/pipermail/nos-bbs_lists.tapr.org/attachments/20220604/833f40cb/attachment.html>